CVE-2026-23565— Denial-of-Service in Content Distribution Service
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I. Basic Information for CVE-2026-23565
Vulnerability Information
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Vulnerability Title
Denial-of-Service in Content Distribution Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to cause the NomadBranch.exe process to terminate via crafted requests. This can result in a denial-of-service condition of the Content Distribution Service.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
TeamViewer DEX Client 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TeamViewer DEX Client是德国TeamViewer公司的一个数字化员工体验和终端管理软件。 TeamViewer DEX Client 26.1之前版本存在安全漏洞，该漏洞源于Content Distribution Service处理不当，可能导致服务终止，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| TeamViewer | DEX | 0 ~ 26.1 | - |
II. Public POCs for CVE-2026-23565
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · TeamViewer · 2026-01-29 · 9 CVEs total
| CVE-2026-23571 | 6.8 MEDIUM | Command Injection in 1E-Nomad-RunPkgStatusRequest Instruction in TeamViewer DEX |
| CVE-2026-23570 | 6.5 MEDIUM | Log timestamp tampering vulnerability in Content Distribution Service |
| CVE-2026-23569 | 6.5 MEDIUM | Out-of-bounds read vulnerability in Content Distribution Service |
| CVE-2026-23564 | 6.5 MEDIUM | Transmission of Unencrypted Data in Content Distribution Service |
| CVE-2026-23567 | 6.5 MEDIUM | Integer underflow in Content Distribution Service UDP handler |
| CVE-2026-23566 | 6.5 MEDIUM | Log Injection in Content Distribution Service UDP Handler |
| CVE-2026-23563 | 5.7 MEDIUM | Privilege escalation in TeamViewer DEX via DeleteFileByPath instruction |
| CVE-2026-23568 | 5.4 MEDIUM | Out-of-bounds read vulnerability in Content Distribution Service |
IV. Related Vulnerabilities
Same product: DEX
- CVE-2026-23570
Log timestamp tampering vulnerability in Content Distributio - CVE-2026-23569
Out-of-bounds read vulnerability in Content Distribution Ser - CVE-2026-23568
Out-of-bounds read vulnerability in Content Distribution Ser - CVE-2026-23567
Integer underflow in Content Distribution Service UDP handle - CVE-2026-23566
Log Injection in Content Distribution Service UDP Handler
Same vendor: TeamViewer
- CVE-2026-23572
Improper Access Control in TeamViewer clients - CVE-2026-23570
Log timestamp tampering vulnerability in Content Distributio - CVE-2026-23569
Out-of-bounds read vulnerability in Content Distribution Ser - CVE-2026-23568
Out-of-bounds read vulnerability in Content Distribution Ser - CVE-2026-23567
Integer underflow in Content Distribution Service UDP handle
Same weakness: CWE-476
- CVE-2026-8252
Open5GS SMF smf_nsmf_handle_create_data_in_hsmf null pointer - CVE-2026-7259
Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2026-23565
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